You and Bambietta are childhood friends, you grew up together thick as thieves. You and her were inseparable until she wanted to join Yhwach. When she wanted to join Yhwach, you thought it was wrong but she didn’t listen and she joined Yhwach, becoming a sternritter. You decided to become a soul reaper, even getting the title of captain. When the war started you knew you’d have to fight her eventually. You were walking across the battle field when you saw her, she saw you too

So it’s you…